Fluid mixer



Feb. 22, 1938. w. .1. JAcoBssoN' i5 ff FLUID MIXER Filed Aug. 8, 1934 .NAM

INVENTOR ATTORNEY liii volume of' gas consumed, 'and accordingly au' to through it which extends, when the mixer is lo i are required to .give the greatest efficiency in ein air port ttl extends through the nozzle body 15 Patented Feb. 22, 193s 2,109,251

UNITED 'STATE-s ,PATENT l OFFICE Carbon Corporation, a corporation of New York Appucuun Annet c, 193.4., sensi No. 'zas-,924.

` 12 claims. (ci. 15a-27.4)

'This invention relates to a iiuid mixer and internal shoulder 29 on the coupling 26. The more particularly to an improved gas mixer for unitary mixer or mixing nozzle 2i! comprises e. blowpipes. The invention relates especially` to l nozzle body having an axial bore therethrough a unitary mixer for blowpipes which first mixes with on enlarged cavity il at the rear end oi o oir with either iuebgos oroxygen and thereafter the bore. An injector t2 is tted inthe cavity 5 mixes the oxygen or fuel-gas with the rst mix- 3l and has its forward partspaced from the wall ture. A e oi 'the cavity and from therear end of the bore in welding and high temperature heating oper- 3o to. provide a chamber 33 communicating with ations it is frequently desirable to reduce the the bore 3d. The injector t2 has an axial bote may be mixed with the combustible gas mixture in position, from 4the chamber it in the handle. before it reaches the flame. Furthermore, in end il to the chamber it in the mixer, being didereht classes ci service different ratios of corndisposed in a position to project iiuid passing Toustion ges, combustionnsupnorting gas and an' through it into the axial here Jill ci the mixer.

operation and gas economy. Une object of this to the cavity il therein tesminating in the chuminvention is to provide a gas mixer in unitary ber iii Thus, a fluid under niessure passing iorm which will properly mix the desired prothrough the injector will aspirato aii portions ci combustion gas, combustionwsupport the ali* port into the chamber tti and thence into 2@ ing gas and air for a given type oi service. iinthe axial bore tu ci the mixing nozzle. Air m other object is the provision oi such a mixer in passages it in the coupling it give access to a form which will permit it to be readily removed atmospheric air into a space ti between the from the blowpipe as a unit. A further object coupling llt and the mixing nozzle it. is the provision o1 a set oi" unitary mixers hav- The forward end ci the mixing nozzle has a 25 ing different dimensions in order that any mixer reduced section and clears the inner walls of 25 y l may be quickly replaced by another mixer of the the stem so as to form a chamber it about this set to meet a change in service requirements forward end. An annular groove tu in the rear y oi the hlownipe. Other. objects will become anend of the mixing nozzle registers with the annuparent upon consideiation ci the present special-L` lar groove it in the forward end il ci the handle 3o cation. t iti to form an annular chamber at the rear end 30 The invention is shown by way oi villustration of the mixing nozzle. One or more longitudinal in the accompanying drawing which represents i passagestt, substantially parallel to the bore fili,

a broken longitudinal mid-section through a connect the annuler chamber termed by the blcwnipe constructed in accordance Witlfi the grooves 39 and 2t with the chamber ttin'the invention. l forward part oi the miidng notizie. 35

in the embodiment oi the invention illustrated From the foregoing the opei'atiori ci the annaln the drawing there is shown a blowpipe handle ratus will be clear. Oxygen coming to the blows it having a forward end ll in which are soldered nine through the oxygen conduit i posses or otherwise attached the end-,ef an oxygen con through the duct it to the oxygen regulating 40 duit it and the end o a fuel-gas conduit it.. A valve i5. When the'valve it is onen the oxygen M duct it formed in the forward end lll oi the posses throughlthe ducts it and i'i. into the handleconnects the oxygen conduit it with an chamber it whence it passes through the axial oxygen regulating valve it from which ducts iti bore 34 in the injector diend through the chamand il, in series, lead to a chamber id at the bei' t3, aspiratlng air and mixing with it in nasshase o a conca-ve conical opening it in the ioring through the axial bore tu of the mixer. Pro- 4&5 wardend ci the handle. A duct it connects theV jected through the end oi the bore it and the fuel-gas conduit it with a fuel-gas control valve chamber tt the oxygen-oir mixture aspirates t l, whence a duct 2i leads to an annular groove fuel-gas from the chamber t8 into the stem where it inthe concave conical opening it. l the oxygen, fuel-gas and air are thoroughly A unitary mixing nozzle 2t is secured in opermixed before being-projected thiough the usual 5g ative position between the handle lll and a stem tip at the end of the stem. Y

iii by means of a lcoupling 26, which may be At the saine time fuel-gas, as acetylene, reach'- screwed upon| external threads il on the fors ing the blowpipe through the fuel-gas conduit o ward end of the handle i l, engaging an annular i3, passes through the duct 2li to the fuel-gas projection 28 on the stem 25 by means of an regulating valve El. When' this valve is open 53 the fuel-gas passes through the duct 22 into the chamber formed between the annular groove 23 and the annular groove 39. Thence the 'fuelgas passes through the longitudinal passage 40 to the chamber 38, and from there is aspirated into the stem as already described. Obviously the oxygen and fuel-gas may be transposed, the fuel-gas passing through the injector 32 and thereby aspirating and mixing with air before it in turn aspirates the oxygen from the chamber I8.

For different types of service different proportions of the gases will be required. In order to meet this situation a set of unitary mixers having different dimensions may be provided, the

' injector and mixer ends being larger or smaller to decrease or increase the size of the chamber 33 or the chamber 38, and the diameters of the bores and passages being increased or decreased as desired. The dimensions of the mixer where it contacts with the handle or the stem will, of course, be equal in all cases, in order that one mixer may be substituted for another.

It will be appreciated, of course, that the example here given and illustrated in the drawing is presented to indicate how the invention may be applied and is not to be taken as limiting its scope.

I claim:

1. A unitary mixing nozzle comprising a nozzle body having an axial bore therethrough with an enlarged cavity at the rear end of the bore, and an injector nozzle fitted in the cavity in said nozzle body, said injector nozzle having a part thereof spaced from the wall of the cavity and from the rear end of the bore to provide a chamber communicating with the` bore, said mixing nozzle having therein a port communicating with the chamber, the axial bore through said mix ing nozzle and the passage through said injector nozzle providing means for passage of a gas through saidmixing nozzle, said nozzle body having therein `a longitudinal passage substantially parallel to the bore, the longitudinal passage in.

said nozzle body providing means for passage of a second gas through said mixing nozzle to the forward end thereof for mixing with the first gas.

2. A unitary mixing nozzle comprising a nozzle body having an axial bore therethrough with an enlarged cavity at the rear end of the bore, and an injector nozzle tted in the cavity in said nozzle body, said injector nozzle having a part thereof spaced from the wall of the cavity and from the rear end of the bore to provide a chamber communicating with the bore, said mixing nozzle having therein a port communicating with the chamber the axial bore through said mixing nozzle and the passage through said injector nozzle providing means formpassage of a gas through said mixing nozzle, said nozzle body having therein an annular recess adjacent its rear end and connecting with the annular recess a longitudinal passage substantially parallel to the bore, the longitudinal passage in said nozzle body providing means for passage of a second gas through said mixing nozzle to the forward end thereof for mixing with the first gas."

3. A unitary mixing nozzle` comprising a nozzle body having an axial bore therethrough with an, enlarged cavity at the rear end of the bore, and an injector nozzle flttedin'the cavity in said nozzle body, said injector nozzle having a part thereof spaced from the wall of the cavity and from the rear end of the bore to provide a chamber communicating with the bore, the axial bore through said mixing nozzle and the passage through said injector nozzle providing means for passage' of a gas through said mixing nozzle,

said nozzle body having therein an annular recess adjacent its rear end and connecting with the annular recess a longitudinal passage substantially parallel to the bore, said nozzle body tact an external face of an-internally threaded body into which said mixing nozzle is screwed to limit the distancewhich said mixing nozzle extends into said body, and an injector nozzle fitted in the cavity in said nozzle body, said inlector nozzle having a part thereof spaced from the wall of the cavity and from the rear end of the bore to provide a chamber communicating with the bore, the axial bore through said mixing nozzle and the passage through said injector nozzle providing means for passage of a gas through said mixing nozzle, said nozzle-body hav-v ing therein a longitudinal passage substantially parallel to the bore, the longitudinal passage in said nozzle body providing means for passage J' of a second gas through said mixing nozzle to the forward end thereof for mixing with the first gas.

5. A unitary mixing nozzle comprising a nozzle body having an axial bore therethrough with an enlarged cavity at the rear end of the bore, a threaded section intermediate the ends of said nozzle, an annular Iprojection adjacent the threaded section, said projection serving to con--V tact an external face of an internally threaded body into which said mixing nozzle is screwed to limit the distance which said mixing nozzle extends` into said body, and an injector nozzle fitted in the cavity in said nozzle body, said injector nozzle having a part thereof spaced from the wall of the cavity and from the rear end of the bore to provide a chamber communicating with the bore, the axial bore through said mixing nozzle andv the passage through said injector nozzle providing means for passage of a gas through said mixing nozzle, said nozzle body having therein an annular recess adjacent its rear vend and. connecting with the annular recess a j longitudinal passage substantially parallel to the bore, the longitudinal passage in said nozzlel body providing means for passage of a second gas `through said mixing nozzle to the forward end thereof for mixing with the first gas, said nozzle body also having therein a port extending from its surface in the rear thereof to the cavity.

6. A unitary mixing nozzle comprising a nozzle body having an axial bore therethrough with an enlarged cavity at the rear end of the bore, and an injector nozzle fitted in the cavity in said nozzle body, said injector ynozzle having a part thereof spaced from the wall'of .the cavity and from the rear end of the bore to provide a chamber communicating with the bore, said mixing nozzle having therein a port communicating with the chamber, the axial bore through said mixing nozzle and the passage through said injector nozzle providing means for passage of a gas through said mixing nozzle, said nozzle body having therein ,a longitudinal passage substantially parallel to thel bore, the longitudinal passage in said nozzle body being substantially shorter' than the combined length of the axial passage and the bore, and providing means for passage of a second gas through said mixing nozzle to the forward end thereof for mixing with the first gas.

-'l. A unitary mixing nozzle comprising a nozzle body having an axial bore therethrough, an enlarged cavity at the rear end of said bore, and an air port extending through the nozzle body to the cavity; and an injector nozzle fitted in the cavity in said nozzle body, said injector nozzle having a nari thereof spaced-from the wall oi the cavity and. from the res-.r end of the here to provide a chamber communicating with the here and said air port, the axial here through scifi mixing nozzle and the passage through said inn lector nozzle providing means for passage of a. gas through said mixing nozzle, said nozzle body having therein a longitudinal passage substantially parallel to the bore providing means for fuel-gas passages therein; a stem having a gas' passage therethrough; a unitary mixer; and

means for securing said mixer between saidV handle and said stem: said mixer having an axial passage therethrough with a cavity at its rear end, an injector nozzle in the cavity in communication with one of the passages in said handle, the axial passage through said mixer and the passage through said7 injector nozzle providing means for passage of a gas through said mixer, an air duct extending through said mixer and communicating with the cavity formed therein, and a second passage in communication with the other passage in said handle, said sec ond passage in said mixer providing means for passageof a second gas through said mixer to the forward end thereof for mixing with the iirst gas.

9. In a blowpipe, a handle having a recess with conical walls at the forward end thereof,

a stem. a unitary mixing nozzle fastened in said stem, said nozzle having a convex conical rear end adapted to mate with the rece at the forward handle end, and means for holding said handle and said stem together with the rear end of said nozzle held firmly in the recess in said handle, said nozzle' having an axial bore therethrough, a cavity in its rear end in continuation of said bore, and an injector nozzle tltted in the cavity in said mixing nozzle.

, 10. In a blowpipe, ahandle having a bore therein and a recess, with conical walls at the forward end thereof; andra mixing nozzle having with the bore therein', 'and an injector nome 1o bore through said mixing uozzlenand javboren nttedln the cavity in said nozzle body. the axial with-rn am ns'.

' through said injector nozzle providing means for passage of a gas through said mixing nozzle, said injector' nozzle having a part thereof spaced from the wall of the cavity and from the rear end of the bore to provide a chamber communicating with the bore, said mixing nozzle having therein a port communicating with the chamben the bore in said injector nozzle communicating with the bore in said handle and with the chamber; said mixing nozzle body having therein a longitudinal passage substantially parallel to the bore. the longitudinal passage in said mixing nozzle body providing means for passage of a second gas through said mixing nozzle to the forward end thereof for mixing with said first gas.

1i. in a blownipe a handle having .a bore there in, n recess with conical walls at tile forward end tiiereoi and another here terminating in the rom cess; an' mixing i n convex conicni rear oriented to intr forward. handle end; s iti 'mixing nozzle corn pricing a nomic irony :Ihre there througlfl and an enlarge .e i ai' enel ci said hooly in communion-sn with the fore there@ in, and an injector nozzle fitted the cavity in said nozzle body, said injector nozzle having a part thereoi spaced from the Wall oi the cavity and from the rear end of the bore to provide a chamber communicating with the here, inn lector nozzle also having a bore therethrough communicating with the bore in said handle and with the chamber; the axial bore through said mixing nozzle and the bore threugh said inlector nozzle providing means for passage of a gas through said mixing nozzle, said nozzle body having therein a port for admitting atmospheric air to the chamber, and said nozzle nods' also hav ing therein an annular recess adjacent the opening of the second bore in said handle and conrmunicating with the annular recess a longitudinal passage for a. second gas suhetantially paralici to the bore in said nonzle body, the longitu dinal passage in said nomic body being adapted to deliver the second gaa adjacent'the forward` end of the axial bore in. said nozzle body for mixture with the rst gas.

' 12. In a blowpipe for projecting different mixtures of fuel gas and oxygen, a handle having fuel gas and oxygen passages therein; a stem having a gas passage therethrough: a removable unitary mixer for mixing the desired mixture fuel gas and oxygen: and means for securing mixer between said handle and said stern: said mixer having a passage therethrough with a cavity at its rear end, an injector nozzle in the cavity in communication with one of the passages in said handle, the passage through said mixer and the passage through said injector nozzle providing means for passage of a gaa through said mixer, an air duct extending through said mixer into the cavity formed therein,r and a seoond passage extending through said mixer substantially parallel to the x'st passage there through. the second passage being in communiproviding for passage of a second gas through iii the recess at the' fain Eil

dil

said mixer ,tothe forward end thereof for mixing ,1; .uiconssonV CERTIFICATE CJP-CORRECTION.

Patent No. 2,109,251. February 2g, 1958.

wILGoT J. JAcoBssoN.

It is hereby certified that error appears in the printed specification of thea` above numbered patent requiring correction as follows: Page 2, first column, line- 57, claim 2, after the word "chamber" insert a comme; and second column, lines 10 toV 1hA inclusive, claim "9', strike out the connna and words the longitudinal psfssage in said nozzle body providing means for passage of Lv second gas through said mixingnozzle to the forward end thereof for mixing with the first gas" and insert the same after "bore" and before' the comma in line Y, sumel claim; and that the Asaid Letters vPatent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office. I y

signed andl sealed this 5th day of April, A. D. 195e.

Henry Van yArsdale, (Seal) Acting Commissioner ofl Patents. 

